Kan. Admin. Regs. § 84-3-4
All persons alleged to have engaged in any unfair practices may be joined as parties, whether jointly, severally, or in the alternative, and a decision may be rendered against one or more of them upon all of the evidence, without regard to the party by or against whom such evidence has been introduced. No proceedings will be dismissed because of nonjoinder or misjoinder of parties. Upon motion of any party or upon motion of the board, its designee or the presiding officer parties may be added, dropped or substituted at any stage of the proceedings, upon such terms as may be deemed as just and proper. Such motions may be made at or prior to the first hearing in any such proceeding unless good and sufficient cause is shown why it could not have been made at such time. Failure to so move shall be deemed a waiver of all objections to a nonjoinder or misjoinder.
Kan. Admin. Regs. § 84-3-4